<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>

    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 商品信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品的名字 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费{{cart.length}}</view>
    </view>

    <rich-text :nodes="goods_info.goods_introduce"></rich-text>

    <!-- 商品导航组件区域 -->
    <view class="goods_nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
	import {mapState,mapMutations,mapGetters} from 'vuex'
	
	export default {
		data() {
			return {
				goods_id:'',
				goods_info:{},
				
				options:[
					{
						icon: 'shop',
						text: '店铺'
					},{
						icon: 'cart',
						text: '购物车',
						info:0
					}
				],
				buttonGroup:[{
					text: '加入购物车',
					backgroundColor: '#ff0000',
					color: '#fff'
				  },
				  {
					text: '立即购买',
					backgroundColor: '#ffa200',
					color: '#fff'
				}]
			}
		},
		methods:{
			// 将vuex模块的方法挂载到此处
			...mapMutations('m_cart',['addToCart']),
			// 商品内部方法
			async getGoodDetail(goods_id){
				const {data:result} =await uni.$http.get('/api/public/v1/goods/detail', { goods_id })
				// console.log(result)
				if (result.meta.status!== 200) return uni.$showMsg(result.meta.msg)
				// 使用字符串的 replace() 方法，为 img 标签添加行内的 style 样式，从而解决图片底部空白间隙的问题
				result.message.goods_introduce = result.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ')
				this.goods_info = result.message
			},
			preview(i){
				uni.previewImage({
					urls:this.goods_info.pics.map(x=>x.pics_big)
				})
			},
			onClick(e){
				if (e.content.text === '购物车') {
				    uni.switchTab({
				        url: '/pages/cart/cart'
				    })
				}
			},
			buttonClick(e){
				// console.log(e)
				// 如果点击的是加入购物车按钮
				if(e.content.text === '加入购物车'){
					
					const goods= {
						goods_id:this.goods_info.goods_id,
						goods_name:this.goods_info.goods_name,
						goods_price:this.goods_info.goods_price,
						goods_count:1,
						goods_small_logo:this.goods_info.goods_small_logo,
						goods_state:true,
					}
					console.log(goods)
					// 通过this调用映射过来的addToCart方法，把商品信息存储到购物车中
					this.addToCart(goods)
				}
			}
		},
		onLoad(option) {
			this.goods_id = option.goods_id | '25969'
			this.getGoodDetail(this.goods_id)
			const cartIcon = this.options.find(x => x.text=="购物车")
			if(cartIcon){
				// 每当加入商品，为商品的info按钮赋予新值,更新购物车图标
				cartIcon.info = this.total
			}
		},
		computed:{
			...mapState('m_cart',['cart']),
			...mapGetters('m_cart',['total'])
		},
		watch:{
			total(newVal){
				// 在data配置的options中查找到购物车图标所在的数据
				const cartIcon = this.options.find(x => x.text=="购物车")
				if(cartIcon){
					// 每当加入商品，为商品的info按钮赋予新值,更新购物车图标
					cartIcon.info = newVal
				}
			}
		}
	}
</script>

<style lang="scss"  scoped>
swiper {
    height: 750rpx;

    image {
      width: 100%;
      height: 100%;
    }
  }

  .goods-info-box {
    padding: 10px;
    padding-right: 0;

    .price {
      color: #C00000;
      font-size: 18px;
      margin: 10px 0;
    }

    .goods-info-body {
      display: flex;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
        margin-right: 10px;
      }

      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }

    .yf {
      font-size: 12px;
      color: gray;
      margin: 10px 0;
    }
  }

  .goods_nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
  }

  .goods-detail-container {
    padding-bottom: 50px;
  }
</style>

